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HomeMy WebLinkAboutELEVATION CERTIFICATE - M19-00104 - Helena - 1693 N 7th E - Helena Dry Fertilizer StorageU.S. DEPARTMENT OF HOMELAND SECURITY Federal Emergency Management Agency National Flood Insurance Program OMB No. 1660-0008 Expiration Date: November 30, 2018 ELEVATION CERTIFICATE Important: Follow the instructions on pages 1–9. Copy all pages of this Elevation Certificate and all attachments for (1) community official, (2) insurance agent/company, and (3) building owner. FEMA Form 086-0-33 (7/15) Replaces all previous editions.Form Page 1 of 6 A1. Building Owner's Name A2. Building Street Address (including Apt., Unit, Suite, and/or Bldg. No.) or P.O. Route and Box No. City State ZIP Code Policy Number: Company NAIC Number: A3. Property Description (Lot and Block Numbers, Tax Parcel Number, Legal Description, etc.) A4. Building Use (e.g., Residential, Non-Residential, Addition, Accessory, etc.) A5. Latitude/Longitude:Lat. Long. Horizontal Datum:NAD 1927 NAD 1983 A6. Attach at least 2 photographs of the building if the Certificate is being used to obtain flood insurance. A7. Building Diagram Number A8. For a building with a crawlspace or enclosure(s): a) Square footage of crawlspace or enclosure(s) sq ft b) Number of permanent flood openings in the crawlspace or enclosure(s) within 1.0 foot above adjacent grade c) Total net area of flood openings in A8.b sq in d) Engineered flood openings?Yes No A9. For a building with an attached garage: a) Square footage of attached garage sq ft b) Number of permanent flood openings in the attached garage within 1.0 foot above adjacent grade c) Total net area of flood openings in A9.b sq in d) Engineered flood openings?Yes No SECTION B – FLOOD INSURANCE RATE MAP (FIRM) INFORMATION B1. NFIP Community Name & Community Number B2. County Name B3. State B4. Map/Panel Number B5. Suffix B6. FIRM Index Date B7. FIRM Panel Effective/ Revised Date B8. Flood Zone(s)B9. Base Flood Elevation(s) (Zone AO, use Base Flood Depth) B10. Indicate the source of the Base Flood Elevation (BFE) data or base flood depth entered in Item B9: FIS Profile FIRM Community Determined Other/Source: NGVD 1929 NAVD 1988 Other/B11. Indicate elevation datum used for BFE in Item B9:Source: B12. Is the building located in a Coastal Barrier Resources System (CBRS) area or Otherwise Protected Area (OPA)?Yes No Designation Date:CBRS OPA FOR INSURANCE COMPANY USESECTION A – PROPERTY INFORMATION HELENA CHEMICAL CO 1693 N 7th E Sugar City Idaho 83448 Parcel Number: RP07N40E337589 Existing and addition both Non-Residential 43.892564° -111.738384° 1A N/A N/A N/A N/A 160217 Madison County Idaho 16065C0030 D 06-03-1991 06-03-1991 X 4903.75ft Noesis Engineering Services, P.C. 208­932­2720 office 1680 Woodruff Park Idaho Falls, ID 83401 Stueve Sugar City Floor Map analysis 08/19/2019 DESIGN ENGINEER: David K. Boyter, PE REVIEWED BY: Dan Sharp, PE SCOPE:______________________________________________________________________________________ Per your request Noesis Engineering Services (NES) has completed a FEMA Flood ElevaƟon analysis of the new building addiƟon at 1693 N 7th E in Sugar City, ID. As shown in the aƩached analysis report the exisƟng building and building addiƟon are near the FEMA Zone A area which requires a Flood ElevaƟon CerƟficaƟon. However, the new building addiƟon and exisƟng building it aƩaches to are in FEMA Zone X meaning no Flood ElevaƟon CerƟficaƟon needs to be filed. NES checked the exisƟng floor elevaƟon and found that it is 1Ō over the flood elevaƟon nearest to the building. The exisƟng ground elevaƟon around the building are also over the flood elevaƟon. It should be noted that the flood elevaƟon is based on a 1­percent chance of being equaled or exceeded each year. Meaning that there will be floods higher than this level, however, the likelihood is small enough that FEMA doesn't require flood insurance purchase. The FEMA maps shows the buildings are in the Zone X unshaded area which, per FEMA, reduces the risk of flood down to 0.2­percent annual chance. ExisƟng FEMA Map:__________________________________________________________________________ Flood Map notes for NES.mcdx Noesis Engineering Services, P.C. 208­932­2720 office 1680 Woodruff Park Idaho Falls, ID 83401 Stueve Sugar City Floor Map analysis 08/19/2019 DESIGN ENGINEER: David K. Boyter, PE REVIEWED BY: Dan Sharp, PE The exisƟng building and building addiƟon are in Zone X, therefore, a ElevaƟon CerƟficaƟon is not required. However, since it is close to the boundary NES has completed the following anlaysis to show how close the finished floor elevaƟon is to the Base Flood ElevaƟon. Flood Map notes for NES.mcdx Noesis Engineering Services, P.C. 208­932­2720 office 1680 Woodruff Park Idaho Falls, ID 83401 Stueve Sugar City Floor Map analysis 08/19/2019 DESIGN ENGINEER: David K. Boyter, PE REVIEWED BY: Dan Sharp, PE FLOOD PROFILES ­2008 FEMA Map Revision:_____________________________________________________ The new building is approximately 100Ō downstream of the railrood crossing. The flood elevaƟon in 1929 verƟcal datum is pulled form the flood profile 100Ō downstream as shown on the figure to the leŌ. ≔FloodNGVD29 4903.75 Ō Flood Map notes for NES.mcdx Noesis Engineering Services, P.C. 208­932­2720 office 1680 Woodruff Park Idaho Falls, ID 83401 Stueve Sugar City Floor Map analysis 08/19/2019 DESIGN ENGINEER: David K. Boyter, PE REVIEWED BY: Dan Sharp, PE Finished Floor ElevaƟon :_______________________________________________________________________ FEMA Flood maps are in the NGVD 1929 verƟcal datum, most of the Ɵme currently the verƟcal datum used is NAVD 88, hƩps://vdatum.noaa.gov/vdatumweb/vdatumweb?a=120105620190725 can be used to convert, the difference is NAVD 88 is 3.514Ō higher than NGVD 1929. The locaƟon used was the point called BASE PT1 by the surveyor ≔Convert =-4911.155 Ō 4907.641 Ō 3.514 Ō FEMA Flood ElevaƟon at Building LocaƟon: =FloodNGVD29 4903.75 Ō ≔FloodNAVD88 =+FloodNGVD29 Convert 4907.264 Ō Due to the difficulty of GPS equipment collecƟng accurate data in areas where a roof overhangs thesurvey locaƟon, NES used both a GPS equipment to gather data and also a level, the following calculaƟons are used to determine the elevaƟon of the exisƟng floor compared to the surveyor point (BASE PT1) collected by the surveyor. ExisƟng Building ElevaƟon: ≔L_base 1.58 Ō Level height over base point 1 ≔Pt_B1 4911.155 Ō Surveyor collected elevaƟon in NAVD88, point called BASE PT1 ≔Level_b_El =+L_base Pt_B1 4912.735 Ō ElevaƟon of level ≔L_3 4.43 Ō ExisƟng Floor ElevaƟon down from Level ≔L_3_EL =-Level_b_El L_3 4908.305 Ō ExisƟng Floor ElevaƟon ≔L_5 4.50 Ō ExisƟng Floor ElevaƟon down from Level ≔L_5_EL =-Level_b_El L_5 4908.235 Ō ExisƟng Floor ElevaƟon ≔ExisƟng_FloorNAVD88 =―――――+L_3_EL L_5_EL 2 4908.27 Ō Average ElevaƟon of the exisƟng floor ≔ExisƟng_FloorNGVD29 =-ExisƟng_FloorNAVD88 Convert 4904.756 Ō =⎛⎝-L_3_EL L_5_EL ⎞⎠0.84 in The difference in elevaƟon of the exisƟng floor shows is less than 1 inch ≔Freeboard_01 =-ExisƟng_FloorNAVD88 FloodNAVD88 1.006 Ō Amount above Flood ElevaƟon Flood Map notes for NES.mcdx